Fix custom action (#1391)

.github/actions/download-workflow-run-artifact/action.yml

@@ -10,9 +10,7 @@ inputs:
 runs:
   using: "composite"
   steps:
-    - run: echo Hello ${{ inputs.who-to-greet }}.
-
-      # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_run
+    # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_run
     - name: 'Download render-test-result artifact'
       uses: actions/github-script@v6
       with:
@@ -35,6 +33,7 @@ runs:
           fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/${{ inputs.artifact-name }}.zip`, Buffer.from(download.data));
 
     - name: Unzip artifact
+      shell: bash
       run: unzip ${{ inputs.artifact-name }}.zip
 
     - name: "Check file existence"